Windows Office

Mobile Office is a trend in modern society, I can immediately enter the work state by using laptop computers to connect with the LAN network interface. But each local area network settings are not the same, such as IP address, gateway and so on, so when I go to a new local area network, I must need to re-set, it is a bit cumbersome. So I want to quickly switch network profile in windows 7, the problem is how to do that.